/*
 * Copyright (c) 2012-2017 Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Red Hat, Inc. - initial API and implementation
 */
package org.eclipse.che.ide.api.machine.events;

import com.google.gwt.event.shared.GwtEvent;
import org.eclipse.che.ide.api.machine.WsAgentState;

/**
 * Event that describes the fact that ws-agent state has been changed.
 *
 * @author Roman Nikitenko
 */
public class WsAgentStateEvent extends GwtEvent<WsAgentStateHandler> {

  /** Type class used to register this event. */
  public static Type<WsAgentStateHandler> TYPE = new Type<>();

  private final WsAgentState wsAgentState;

  /**
   * Create new {@link WsAgentStateEvent}.
   *
   * @param state the type of action
   */
  protected WsAgentStateEvent(WsAgentState state) {
    this.wsAgentState = state;
  }

  /** Creates a ws-agent started event. */
  public static WsAgentStateEvent createWsAgentStartedEvent() {
    return new WsAgentStateEvent(WsAgentState.STARTED);
  }

  /** Creates a ws-agent stopped event. */
  public static WsAgentStateEvent createWsAgentStoppedEvent() {
    return new WsAgentStateEvent(WsAgentState.STOPPED);
  }

  @Override
  public Type<WsAgentStateHandler> getAssociatedType() {
    return TYPE;
  }

  /** @return the state of ws-agent */
  public WsAgentState getWsAgentState() {
    return wsAgentState;
  }

  @Override
  protected void dispatch(WsAgentStateHandler handler) {
    switch (wsAgentState) {
      case STARTED:
        handler.onWsAgentStarted(this);
        break;
      case STOPPED:
        handler.onWsAgentStopped(this);
        break;
      default:
        break;
    }
  }
}
